<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>展示数据</title>
</head>
<body>
<div>
    {% for u in us %}
        <h2>
            {{ u.username }}
        </h2>

    {% endfor %}
    <h1>??????</h1>
</div>

</body>
</html>